Friction-buffer for railway-cars.



I. FI ocoNNoII.

Patented July 13, 1915.

FRICTION BUFFER FOR RAILWAY CARS.

APPLICATION FILED FEB. Io. I9I3. 1,146,344..

COLUMBIA PLANOGRAPH co.,wAsHlNUTON. D. c.

I; F. ocoNNoII.

FRICTION BUFFER FOR RAILWAY CARS.

APPLICATION FILED IEB. Io. 1913.

Patented July 13, 1915.

3 SHEETS-SHEET 2.

`J. F. ocoNNoR. FRICTION `BUFFER FOR RAILWAY CARS.

APPLICATION FILED FEB. I0. 1913. I 1,146,344. Patented July 13, 1915.

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NNNNNN 0R J0 ff Va/maf BY 'rn sfrafr JOHN n. OCONNOR, on CHICAGO, ILLINOIS, AssIeNon 'IO WILLIAM H. iv'rINnIt, OF

CHICAGO, ILLINOIS.

FRICTION-BUFFER FOR RAILWAY-CARS.

Specification of Letters Patent.

Patented July 13, i915.

vApplication filed February 10, 1913. Serial No. 747,221. i

T0 all whom t may concern.'

Be it known that I, JOHN F. OCONNOR, a citizen of the United States, residing at Chicago, in the county of Cook" and State of Illinois, have invented a certain new and useful Improvement in Friction-Buffers for Railway-Cars, of which the following is a full, clear, concise, and exact description,

reference being had tothe accompanying` section line A1 --2 of Fig. 2 and the lower half below said section line 2-2 is taken on the line 1-3 of Fig. 2. Fig. 2 is a plan view partly in horizontal section on line 12--2 of Fig. 1. Fig. 3 is a plan view partly in hori- Zontal section of the compression resisting member showing Vthe position of vthe parts when the spring cap engages the wedge member. Fig. 4 is a lplan view partly in horizontal section of the compression resisting member showing the position of the parts when in full compression. Fig.5is a perspective view of the mainbulfer spring seat. Fig. 6 is a perspective view `of the wedge. Fig. 7 is a perspective view of one of the friction shoes. Fig. 8 is a perspective view of one of the anti-friction rollers. Fig. 9 is a perspective view of the compression resisting member. Fig. 10 is a perspective view of the evener. Fig. 11 is a perspective view of a supplemental spring washer.

In the drawings 12 represents a portion of Vthe frontend frame of a railway passenger car, 13 the buffer cage or frame, 14 a steel floor platevof the vestibuleof the car, 15 the buffer plate, 16 the buer bar, 17 tl e foot or chafe plate, 18 the side stem, 19 the side stem spring, 2O the main transom'casting.

The numeral 21 represents the compression resisting member. The buffer cage or frame 13 forms a part ofthe framework of the car, and is furnished with supports 22 and 23 to receive the buffer bar`16,andwith -a chamber 24 beneath the vestibule plate 14 of the car to receive the compression resisting member 21, and vwithv the saddle 25 and the supportingplate 26 for holding in position the compression resisting member.

The compression resisting member 21 com-4 prises a spring cap 27, main buffer springs 23, 28, friction mechanisms 29, r29, the shell 30, supplemental springs 31, and the evener 32.

The Shen eo is provided with thefrieaon chambers 33, 33, preferably two in number,

and arranged side by side. Each friction chamber is open at both ends, and each chamber contains a friction mechanism 29. The shell also contains a plurality of supplemental spring chambers, preferably two in number, the said chambers being arranged adjacent tothe friction chambers, and one at either side of the same,and preferably forwardly extended to forma space between them in which the spring cap 27 operates.

The spring chambers each contain a supplemental spring 31, and are each'preferably open at the forward ends 34, 34, and closed at the rear ends by the preferably integral plate 35, each of said plates having a perforation 36 for the passage of a bolt 37,

' which extends through the said chamber and connects the washer or'movable spring seat 38 with the evener 32. The said bolt is adapted to compress the supplemental spring, (through which it passes), 'between the washer 38 Vand the plate 35 on rearward movement of the evener.

The shell 30 is rearwardly provided with a recess 39 within which the evener 32 operates. The said evener extends substantially across the width of the said recess, and is forwardly provided with a plurality of bosses 40, equal in number to the friction chambers, each of which is adapted to enter a friction chamber and engage the friction mechanism 29 therein. The friction mechanism in cach friction chamber comprises friction shoes41, preferably three in numeach wedging face 42TL of the wedge and a wedging face 43 of the adjacent shoe is interposed an anti-friction roller 46. The wedge 42 is forwardly provided with an extension or wedge stem 47, which is preferably integral with the wedge. An opening 48 passes through the wedge and stem to receive the connecting rod 49, which extends therethrough, and through the evener at its one end and the spring cap at its other end.

rThe spring cap 27 is provided with a plurality of main spring chambers 50, prefer'- ably two, there being one opposed to each friction chamber. Within each spring chamber cf the spring cap there is extended from the forward end a hub 51, within which is provided the recess 52 to receive the head 53 of the connecting rod 49. rlhe recess 52 is of sufficient ylength to permit the 'movement of the head of the connecting rod therein in the reciprocating movement of the spring cap. rlhe connecting rod is provided at its rear end with the nut 54, the said connecting rod serving to keep the spring cap and its contained parts, the friction mechanism, within the friction chambers, and the evener in assembled position. Within each spring cap 27 is a main buffer spring 28, which is seated at its forward end around the hub 51, and at its rear end against a main buffer spring seat Each spring seat 55 comprises a rim 56 adapted to engage the forward end 57 of the surrounding wall 58 of a friction chamber, and is also provided with an opening 59 adapted to receive the stem 47 of the wedge 42 therethrough. rlhe main spring 28 for a portion of its length surrounds the stem 47 of the wedge 42, and is adapted to be compressed against the face 60 of the spring seat 55. The spring seats 55 may be varied in longitudinal dimension, and the length of the main buffer springs proportionately varied, as may be desired.

l prefer to construct my buffer with a space when the parts are in normal position between the evener and the adjacent spring chamber, as indicated by the numeral 63, Fig. 2, to allow for any wear. Each supplemental spring is preferably of greater compression resisting capacity than one of the main springs.

rlfhe buffer bar 16 at its rear end 62 engages the spring cap 21. 0n rearward movement of the buffer bar the main buffer springs are compressed between the spring cap and the spring seat 55 immediately in front of the friction mechanism until each hub 51 engages the alined stem 47 of the wedge 42. Pfhereupon the wedges move rearwardly, spreading the friction shoes 41 of the friction mechanisms, and forcing them rearwardly. rl`he friction shoes through their engagement with the evener 32 and its connection with the bolts 37, 37 almost simultaneously with the beginning of the wedging action between the wedges and shoes cause the supplemental springs 31 each to be rearwardly compressed between the spring chamber at the rear end and the washer 38 at the forward end. Meanwhile the main buffer springs are further compressed against the spring seats 1t will be apparent that the frictional release of the friction mechanism is absolutely certain in this device regardless of the length of movement of the friction mechanism within the friction chambers, because the main buffer spring is seated independently of the friction mechanism. rlhe friction shoes in release action are always brought immediately to their normal position from any possible position in their frictional movement regardless of the length of said movement, and are therefore always when in service in position for innnediate frictional resistance. 0n release movement of the parts the supplemental springs instantly draw the evener to normal position, thus returning the friction slices and we( ging members to normal position within the friction chambers. Meanwhile the main buffer spring is expanding, the greater portion of its expansive 'movement taking place, however, after the wedge stem and spring cap have disengaged, which disengagement occurs instantly with the return of the fricd tion members to normal position.

The stem 47 of the wedge 42 as an integral member of the wedge permits an action in which the wedge 'is never loose, and in which its wedging faces are each always in the same relative position to each of the adjacent wedging faces of the friction shoes, and thereby the antifriction rollers are always held in taut position, and in the same relative position to each other.

l claim 1. In a friction buifer in combination, a shell, friction chambers, and spring chambers within the shell, the spring chambers being at the sides of the friction chambers friction mechanismvin the friction chambers, springs in the spring chambers, means connecting the said springs and friction mechanism, a main spring, a spring cap, the main spring being seated between the shell and spring cap, and the spring cap being adapted to engage the friction mechanism on partial compression of the main spring.

2. ln a friction buffer, a buffer bar, a spring cap engaging therewith, springs within the spring cap, a shell, friction chambers within the shell, friction mechanism in the friction chambers, springs at the sides of the friction chambers, and means connecting said springs with the friction mechanism.

3. l'n the cushioning member of a friction buffer, a shell, spring chambers and friction chambers in said shell, supplemental springs within the spring chambers and friction mechanism within the friction chambers, a spring cap, main springs between the spring cap and shell, means connecting the friction mechanism to the supplemental springs, the said friction chambers being arranged side by side, and the spring chambers being arlilanged at either side of the friction chamers.

4:. In a friction buffer, a buffer bar, a spring cap, a shell, a pair of friction chambers in twin arrangement in said shell, friction mechanism in said friction chambers, springs between the spring cap and shell, and supplemental springs at the sides of the friction chambers, and an evener connecting the friction mechanism with the supplemental springs.

5. In a friction buffer, in combination, a buffer bar, a spring cap, a shell, a pair of friction chambers side by side in said shell, said friction chambers open at both ends, a spring chamber at either side of the friction chambers, friction mechanism within the friction chambers, springs within the spring chambers, an evener, means for connecting said evener to the supplemental springs, bosses on said evener, said bosses adapted to enter the friction chambers and engage the friction mechanism, and main springs, said main springs being seated between the spring cap and shell.

6. In a friction buffer, the combination with a buer bar and a spring cap, of a shell having friction chambers, spring chambers, and an evener chamber therein, springs in the spring chambers, friction mechanism in the friction chambers, an evener in the evener chamber, springs between thespring cap and shell, and means for engaging the spring cap and friction mechanism, the said evener engaging the friction mechanism, and having means connecting it to the springs in the spring chambers.

7. In a friction buffer, in combination, a buffer bar, a spring cap, a shell, a pluralityT of friction chambers in said shell, springs at either side of the friction chambers and substantially parallel therewith, a space between said springs and in front of the friction chambers adapted to receive the spring cap, means connecting said springs with the friction mechanism, and springs seated between the spring cap and shell.

8. In a friction buifer, in combination, a buffer bar, a spring cap, a shell, friction chambers in said shell, friction mechanism in said chambers, further chambers at the sides of the friction chambers, compression resisting mechanism in said chambers, means connecting the mechanism in all said chambers, springs seated between the spring cap and shell.

f J OIIN F. OCONNOR. Witnesses:

ELEANOR L. NASH, JOHN A. MARTINKUS.

G'opies o1 this patent may be obtained for ve cents each, by addressinglthe Commissioner of Patents, Washington, D. G. 

